Complexing of Cu(II) with N,N'-Diphenylthiooxamide and N,N'-Diphenyldithiooxamide in a Gelatin-Immobilized Cu2[Fe(CN)6] Matrix

A study was made of complexing in Cu(II)-N'N'-diphenylthiooxamide, Cu(II)-N'N'-di-phenyldithiooxamide systems in gelatin-immobilized Cu₂Fe(CN)₆] matrices brought into contact withaqueous alkaline (pH 12.0±0.1) solutions of these ligands. In both cases, complexing is preceded by alkaline breakdown of copper(II) hexacyanoferrate(II) into Cu(II) hydroxide or oxohydroxide which is the species reacting with the ligands. In each system, complexing yields a Cu(HL)2 chelate (HL^- is the single-deprotonated form of N,N'-diphenylthiooxamide or N,N'-diphenyldithiooxamide).